Natural bender with outstanding recovery quickness, lateral agility and balance to mirror and sustain — is seldom on the ground or beaten in pass protection. Plays with a very solid base. Throws his hips in the hole and wins with quickness at the snap. Controls defenders with his hands. Is athletic running the field and can connect on the second level. Good football intelligence. Quick learner. Flipped sides and has proven he can play in a left- or right-hand stance. Versatility is a big plus — can play either tackle position and has the quickness to handle movement on the inside. Solid character. Very committed, dedicated approach — has not missed a practice or game. Is a tough, durable, hardworking four-year starter.
Negatives:

Does not look the part — is knock-kneed, fleshy-bodied and pear-shaped. Lacks ideal height and arm length for the outside. Not a nasty finisher or fiery run blocker. Not strong-handed or violent with his punch. Tends to set tall and catches a lot. Undisciplined eyes — late to see and adjust to some stunts. Conditioning has been a concern, and diet might require some additional monitoring.
Summary:

A model of consistency on and off the field, Allen makes the game look easy and is one of the best pure pass protectors in this year’s draft, with unique balance, coordination and agility to warrant late-first-round consideration as a left tackle prospect. Versatility, football smarts and durability could allow him to start immediately and play at a high level for the next 10 years.